In recent years, more and more boaters have been purchasing their marine navigation charts online and making the switch from traditional paper charts. These electronic charts come with a wide range of benefits, including instant access to detailed maps, tide info and navigation aids from your smartphone or tablet.

But with this modern convenience comes responsibility. It’s important to remember that a few common mistakes can quickly turn a smooth sailing trip into a stressful one. Here’s what to watch out for and how to stay safe on the water when using online charts.

1. Relying Solely on Online Charts

Digital tools are great, except for when batteries die, apps crash and signals drop. This is why you should always carry a paper backup of your route, especially if you’re heading into remote areas. A printed chart and a compass may seem outdated, but these tools can be real lifesavers.

2. Not Downloading Charts for Offline Use

Many apps allow you to view charts offline, but only if you’ve downloaded them ahead of time. Don’t make the mistake of assuming you’ll have service on the water. Before you leave the dock, make sure all relevant charts are saved locally to your device.

3. Ignoring Updates

Whether it’s shifting shoals or relocated buoys, marine environments are constantly changing, resulting in new hazards. Most reliable platforms offer regular updates, but you have to manually check for and install them. So, make sure you check for updates before any voyage.

4. Misinterpreting Symbols and Depths

Reading online charts isn’t the same as glancing at Google Maps or even using paper charts. Take the time to learn what the different symbols mean, how to read depth contours and what tide levels might affect your route. Mistaking a shallow sandbar for safe water can be a costly error.

5. Overlooking Local Notices and Warnings

Even the most detailed chart may not show temporary hazards like debris, construction zones or restricted areas. Always check local marine notices and alerts before you head out.

Are you looking to purchase marine navigation charts online in Australia? Here at Boat Books, we offer a wide range of options, including electronic charts, paper charts and various accessories. Visit our store in Sydney, browse online, or contact us should you have any questions about what we have to offer.